<template>
  <div class="app">
    <h1>你好啊！很好</h1>
  </div>
</template>

<script lang="ts">
  export default {
    name:'App' //组件名
  }
</script>

<style>
  .app {
    background-color: #ddd;
    box-shadow: 0 0 10px; 
    border-radius: 10px;
    padding: 20px;
  }
</style>